Quarterly report pursuant to Section 13 or 15(d)

Loans - Troubled Debt Restructurings (Detail)

v3.20.1
Loans - Troubled Debt Restructurings (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Nonaccrual TDRs    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 29,392 $ 55,478
Nonaccrual TDRs | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 27,708 41,798
Nonaccrual TDRs | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 1,009 12,991
Nonaccrual TDRs | Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 675 689
Nonaccrual TDRs | Deferral of Principal    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 675 689
Nonaccrual TDRs | Deferral of Principal | Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 675 689
Nonaccrual TDRs | Deferral of Principal and/or Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 312 285
Nonaccrual TDRs | Deferral of Principal and/or Interest | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 128 132
Nonaccrual TDRs | Deferral of Principal and/or Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 184 153
Nonaccrual TDRs | Reduction of Principal and/or Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 14,273 40,266
Nonaccrual TDRs | Reduction of Principal and/or Interest | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 13,748 27,740
Nonaccrual TDRs | Reduction of Principal and/or Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 525 12,527
Nonaccrual TDRs | Extension of Maturity    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 14,132 14,238
Nonaccrual TDRs | Extension of Maturity | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 13,832 13,926
Nonaccrual TDRs | Extension of Maturity | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 300 312
Accrual TDRs    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 758 830
Accrual TDRs | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 164 222
Accrual TDRs | Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 595 608
Accrual TDRs | Deferral of Principal    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 521 531
Accrual TDRs | Deferral of Principal | Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 521 531
Accrual TDRs | Deferral of Principal and/or Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend   36
Accrual TDRs | Deferral of Principal and/or Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend   36
Accrual TDRs | Reduction of Principal and/or Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 137 148
Accrual TDRs | Reduction of Principal and/or Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 63 71
Accrual TDRs | Reduction of Principal and/or Interest | Consumer    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 74 77
Accrual TDRs | Extension of Maturity    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 101 114
Accrual TDRs | Extension of Maturity | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 101 $ 114